Flame Ionization Detector

The global growth of heavy industry has caused the hydrocarbon content in ambient air to rise sharply in many regions in recent years. This content can be measured by Flame Ionization Detector sensors, designed to measure flammable Total Hydrocarbons (THC) down to ppb levels, in processes where THC contamination is possible, such as in Air Separation Plants, product pipelines and cylinder filling stations.

The Flame Ionization Detector (FID) sensor works on the principle of detecting ions formed in the combustion of organic compounds in a sample, producing charged molecules that cause electrical conduction between two electrodes. The ions are attracted to a collector plate and induce a current upon hitting the plate. The FID measures this conduction and produces an output which is directly proportional to the concentration of Total Hydrocarbons (THC) in the sample.

In the SERVOPRO FID, this signal is enhanced by a logarithmic amplifier that decreases drift and thermal noise, giving an accurate, non-depleting measurement with 100ppb resolution.

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